EP1911998B1 - Sealing system between two coaxial rotating shafts - Google Patents
Sealing system between two coaxial rotating shafts Download PDFInfo
- Publication number
- EP1911998B1 EP1911998B1 EP07118222.4A EP07118222A EP1911998B1 EP 1911998 B1 EP1911998 B1 EP 1911998B1 EP 07118222 A EP07118222 A EP 07118222A EP 1911998 B1 EP1911998 B1 EP 1911998B1
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- EP
- European Patent Office
- Prior art keywords
- wipers
- annular
- sealing system
- outer shaft
- inner shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/42—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by centrifugal force
Definitions
- the invention relates to a sealing system between two coaxial rotating shafts and relates more particularly to a new type of dynamic seal arranged between these two shafts.
- a contact seal (carbon seal or brush seal) involves wear. It must therefore be changed periodically. In addition, for the carbon seal, its fragility makes assembly difficult. A low air flow entering the enclosure is most often required to maintain a pressurization thereof. Wear is even greater when the shafts are counter-rotating.
- a non-contact seal such as a labyrinth seal, requires a much larger airflow and sometimes it is difficult to obtain the desired pressure.
- an air-oil mixture is created in the enclosure, which requires a de-oiling device before evacuation of the air. The efficiency of this device is inversely proportional to the air flow rate to be treated. The compromise is difficult to establish.
- the deoiling device is expensive, bulky and heavy.
- the invention overcomes these disadvantages by providing a seal structure without external air intake and wear-free detrimental to the effectiveness of the system in the long term.
- the invention relates in the first place to a sealing system between two coaxial and superposed rotating shafts, respectively an internal shaft and a tubular outer shaft, characterized in that it comprises, connected to the internal shaft, to the at least one segmented annular assembly of wipers, movable under the effect of centrifugal force and moving substantially radially towards the outer shaft and an annular receptacle for liquid, arranged on the inner surface of the outer shaft facing curved edges of said wipers, said curved edges immersed in this liquid when said wipers are moved under the effect of the centrifugal force.
- the liquid is oil.
- the system comprises two aforementioned sets of wipers angularly offset relative to one another.
- each set may comprise four wipers each covering a sector of 90 ° in the state of rest.
- the two sets of wipers are arranged vis-à-vis.
- the two sets of wipers are circumferentially superimposed on one another.
- a aforesaid wiper of the same set comprises a closure element comprising a flat rib with a curved, substantially radial edge while said closure element is attached to a flexible blade anchored to the bottom of a support. wherein is defined a cylindrical cavity open at one end, said support being attached to the outer surface of said inner shaft. Said closure member cooperates with the open end of said cylindrical cavity.
- the closure member has a cylindrical portion adjacent to said flat rib and attached along an edge thereof.
- said flexible blade extends from the middle of this cylindrical portion.
- Said flexible blade can be attached near one end of the closure element, to promote the displacement of one of the ends, in priority, during the rotation.
- said inner surface of the outer shaft comprises an annular groove situated opposite said sectored annular set of wipers and an oil nozzle or the like is disposed in the vicinity of this groove and oriented to deposit therein. oil at each rotation of said outer shaft.
- the invention is particularly indicated when the two shafts are counter-rotating.
- FIG. 1 and 2 and the corresponding cuts there are shown two coaxial rotating shafts, respectively an inner shaft 12 and a tubular outer shaft 14. The two trees are superimposed.
- the sealing system according to the invention is installed between these two rotating shafts, inside a housing 16 extending between the outer surface of the inner shaft and the outer surface of the outer shaft.
- This housing houses a nozzle 18 of liquid, in this case oil. This oil feeds the sealing system as soon as the external shaft is rotating.
- the sealing system comprises at least one segmented annular assembly 20a, 20b of wipers 22, movable under the effect of the centrifugal force and moving substantially radially towards the external shaft 14 when they are subject to this force.
- the wipers 22 are connected to the internal shaft.
- the sealing system comprises two sets 20a, 20b above wipers, angularly offset relative to each other.
- the arrangement is particularly visible on Figures 5 and 6 .
- the two sets 20a, 20b of wipers are arranged vis-à-vis.
- each set includes four wipers 22 curves occupying a sector of 90 °.
- a wiper 22 of the same set comprises a closure member 24 comprising here a flat rib 26 and a cylindrical portion 28 adjacent to said flat rib and attached along an edge thereof.
- the flat rib projects outwards, that is to say in the direction of the inner surface of the outer shaft 14. It has a curved edge 29 with a circular contour.
- This flat rib 26 extends substantially in a radial plane in the rest position.
- the closure member 24 is attached to a flexible blade 30 anchored to the bottom of a support 36a or 36b in which is defined a cylindrical cavity 38a or 38b.
- This support is cylindrical and fixed to the outer surface of said internal shaft.
- This cylindrical cavity is open at the end, where the closure element 24 is located.
- the flat rib 26 extends outside the cavity and the closure element cooperates with the open end of said cavity. cavity.
- the cylindrical cavity 38a or 38b is extended in the support by longitudinal recesses 39 where the flexible blades 30 extend. The latter are anchored to the support at the bottom of these recesses.
- the inner shaft has two supports 36a, 36b with two open cylindrical cavities 38a, 38b whose open ends are vis-à-vis.
- Each support 36a, 36b houses a set of wipers and these cooperate with the open end of the corresponding cavity 38a, 38b. Because of the flexibility of the tongue, each wiper can thus move substantially radially (with a slight rotational movement) to the outer shaft, under the effect of the centrifugal force imparted by the rotation of the inner shaft.
- a spacer 41 interposed between the two supports makes it possible to adjust the axial distance separating the assemblies 20a, 20b.
- annular receptacle for liquid here constituted by a groove 42 formed on the inner surface of the outer shaft makes it possible to create, when the outer shaft rotates, a centrifuged liquid ring. 40. This is maintained on the inner surface of said outer shaft 14, facing curved edges of said wipers, more particularly the edges 29 of the ribs 26.
- the liquid is advantageously oil.
- the annular groove 42 is situated facing the annular or sectored annular assembly of the wipers while the oil nozzle is disposed in the vicinity of this groove and is oriented to deposit oil therein each rotation of the shaft. outside. Therefore, under the effect of the centrifugal force imparted by the rotation of the outer shaft, the liquid (oil) accumulates and is held at the bottom of the annular groove. In operation, the cylindrical portion 28 bears on the support 36 so that the curved edge 29 dips into the liquid without touching the bottom of the groove 42.
- a groove 44 is defined at one end of the support 36b integral with the internal shaft and in which the cavity 38b is defined and this groove is extended by bores 45, 47 formed in the support.
- the bores open radially opposite the annular groove 42 formed on the inner surface of the outer shaft, to feed said centrifuged oil ring, maintained in this annular groove.
- the annular groove comprises a plenum barrier 46 arranged between an annular portion 48 which plunges said wipers and an adjacent annular portion 50, where the oil is deposited. More precisely, this adjacent annular portion is opposite the orifices of the bores 47.
- the stilling barrier generally annular, comprises at least one indentation or the like allowing the oil to pass from one part to the other.
- annular groove 56 adjoins that which is arranged opposite the wipers. It is practiced on the inner face of the outer shaft in the inter-shaft space and communicates with the housing by a drain 58 traversing this shaft. An oil leak is thus recovered in the crankcase. The oil that falls into the crankcase can be recovered and recycled.
- curved inner edges of the closure elements 24 are substantially in contact at their ends when the wipers are not not subject to centrifugal force.
- the space between the ends of the wipers increases, hence the interest of providing two sets of wipers offset circumferentially. In the case of an assembly consisting of four wipers, said sets are shifted by 45 °.
- the inner shaft has a single open cylindrical cavity 38 defined in a single cylindrical support 36a attached to the outer surface of this shaft.
- the closure elements 24 of the two sets of wipers are housed in the same cylindrical cavity.
- the closure elements of the two sets 20a, 20b of wipers 22 cooperate in superposition with the open end of this cavity 38.
- the nozzle 18 is directly directed towards the annular groove 42 which materializes the ring of centrifuged liquid.
- the annular groove comprises a stilling barrier 46 located between the annular portion 48 where the wipers dip and the adjacent annular portion 50 where the oil is deposited by the nozzle.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Centrifugal Separators (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
L'invention se rapporte à un système d'étanchéité entre deux arbres tournants coaxiaux et concerne plus particulièrement un nouveau type de joint dynamique agencé entre ces deux arbres.The invention relates to a sealing system between two coaxial rotating shafts and relates more particularly to a new type of dynamic seal arranged between these two shafts.
Dans un turboréacteur d'avion, par exemple, il est nécessaire de définir et isoler une enceinte entourant un organe mécanique tel qu'un roulement ou pignon installé entre deux arbres tournants. Dans cette enceinte, de l'huile est injectée pour lubrifier et refroidir ledit organe mécanique. L'isolation de l'enceinte nécessite notamment un joint entre les deux arbres tournants.In an aircraft turbojet, for example, it is necessary to define and isolate an enclosure surrounding a mechanical member such as a bearing or pinion installed between two rotating shafts. In this chamber, oil is injected to lubricate and cool said mechanical member. The isolation of the enclosure requires in particular a seal between the two rotating shafts.
Pour ce type d'application, on distingue des joints avec contact et d'autres sans contact (
Un joint sans contact, tel qu'un joint labyrinthe, nécessite un débit d'air beaucoup plus important et il est parfois difficile d'obtenir la pression souhaitée. De plus, un mélange air-huile se crée dans l'enceinte, ce qui nécessite un dispositif de déshuilage avant évacuation de l'air. L'efficacité de ce dispositif est inversement proportionnelle au débit d'air à traiter. Le compromis est donc difficile à établir. De plus, le dispositif de déshuilage est coûteux, encombrant et lourd.A non-contact seal, such as a labyrinth seal, requires a much larger airflow and sometimes it is difficult to obtain the desired pressure. In addition, an air-oil mixture is created in the enclosure, which requires a de-oiling device before evacuation of the air. The efficiency of this device is inversely proportional to the air flow rate to be treated. The compromise is difficult to establish. In addition, the deoiling device is expensive, bulky and heavy.
L'invention permet de surmonter ces différents inconvénients en proposant une structure de joint sans apport d'air externe et sans usure préjudiciable à l'efficacité du système, à long terme.The invention overcomes these disadvantages by providing a seal structure without external air intake and wear-free detrimental to the effectiveness of the system in the long term.
A cet effet, l'invention concerne en premier lieu un système d'étanchéité entre deux arbres tournants coaxiaux et superposés, respectivement un arbre interne et un arbre externe tubulaire, caractérisé en ce qu'il comporte, lié à l'arbre interne, au moins un ensemble annulaire sectorisé de léchettes, mobile sous l'effet de la force centrifuge et se déplaçant sensiblement radialement vers l'arbre externe et un réceptacle annulaire pour liquide, agencé à la surface intérieure de l'arbre externe en regard de bords courbes desdites léchettes, lesdits bords courbes plongeant dans ce liquide lorsque lesdites léchettes sont déplacées sous l'effet de la force centrifuge.To this end, the invention relates in the first place to a sealing system between two coaxial and superposed rotating shafts, respectively an internal shaft and a tubular outer shaft, characterized in that it comprises, connected to the internal shaft, to the at least one segmented annular assembly of wipers, movable under the effect of centrifugal force and moving substantially radially towards the outer shaft and an annular receptacle for liquid, arranged on the inner surface of the outer shaft facing curved edges of said wipers, said curved edges immersed in this liquid when said wipers are moved under the effect of the centrifugal force.
Ainsi, lorsque l'arbre externe est en rotation, et que du liquide est déposé dans ce réceptacle annulaire, un anneau de liquide centrifugé est formé, dans lequel plongent lesdites léchettes.Thus, when the outer shaft is rotating, and liquid is deposited in this annular receptacle, a ring of centrifuged liquid is formed, in which dip said wipers.
De préférence, le liquide est de l'huile.Preferably, the liquid is oil.
De préférence, le système comporte deux ensembles précités de léchettes décalés angulairement l'un par rapport à l'autre. Par exemple, chaque ensemble pourra comporter quatre léchettes couvrant chacune un secteur de 90° à l'état de repos.Preferably, the system comprises two aforementioned sets of wipers angularly offset relative to one another. For example, each set may comprise four wipers each covering a sector of 90 ° in the state of rest.
Selon un mode de réalisation possible, les deux ensembles de léchettes sont agencés en vis-à-vis.According to one possible embodiment, the two sets of wipers are arranged vis-à-vis.
Selon une autre possibilité, les deux ensembles de léchettes sont superposés circonférentiellement l'un sur l'autre.Alternatively, the two sets of wipers are circumferentially superimposed on one another.
Selon un exemple préféré, une léchette précitée d'un même ensemble, comporte un élément d'obturation comprenant une nervure plate à bord courbe, sensiblement radiale tandis que ledit élément d'obturation est rattaché à une lame flexible ancrée au fond d'un support dans lequel est définie une cavité cylindrique ouverte à une extrémité, ledit support étant fixé à la surface extérieure dudit arbre interne. Ledit élément d'obturation coopère avec l'extrémité ouverte de ladite cavité cylindrique.According to a preferred example, a aforesaid wiper of the same set comprises a closure element comprising a flat rib with a curved, substantially radial edge while said closure element is attached to a flexible blade anchored to the bottom of a support. wherein is defined a cylindrical cavity open at one end, said support being attached to the outer surface of said inner shaft. Said closure member cooperates with the open end of said cylindrical cavity.
De préférence, l'élément d'obturation comporte une portion cylindrique adjacente à ladite nervure plate et rattachée le long d'un bord de celle-ci.Preferably, the closure member has a cylindrical portion adjacent to said flat rib and attached along an edge thereof.
Par exemple, ladite lame flexible s'étend à partir du milieu de cette portion cylindrique. Ladite lame flexible peut se rattacher près d'une extrémité de l'élément d'obturation, pour favoriser le déplacement d'une des extrémités, en priorité, lors de la mise en rotation.For example, said flexible blade extends from the middle of this cylindrical portion. Said flexible blade can be attached near one end of the closure element, to promote the displacement of one of the ends, in priority, during the rotation.
Selon une autre caractéristique remarquable, ladite surface intérieure de l'arbre externe comporte une gorge annulaire située en regard dudit ensemble annulaire sectorisé de léchettes et un gicleur d'huile ou analogue est disposé au voisinage de cette gorge et orienté pour y déposer de l'huile à chaque mise en rotation dudit arbre extérieur.According to another remarkable characteristic, said inner surface of the outer shaft comprises an annular groove situated opposite said sectored annular set of wipers and an oil nozzle or the like is disposed in the vicinity of this groove and oriented to deposit therein. oil at each rotation of said outer shaft.
L'invention est particulièrement indiquée lorsque les deux arbres sont contra-rotatifs.The invention is particularly indicated when the two shafts are counter-rotating.
L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront mieux à la lumière de la description de plusieurs modes de réalisation possibles d'un système d'étanchéité conforme à son principe, donnée à titre d'exemple et faites en référence aux dessins annexés dans lesquels :
- la
figure 1 est une vue schématique en coupe d'un système d'étanchéité entre deux arbres coaxiaux, représenté au repos ; - la
figure 1A est une coupe I-I de lafigure 1 ; - la
figure 2 est une vue analogue à lafigure 1 illustrant le fonctionnement du système d'étanchéité lorsque les deux arbres sont en rotation ; - la
figure 2A est une coupe II-II de lafigure 2 ; - la
figure 3 est une vue analogue à lafigure 1 illustrant une variante ; - la
figure 4 est une vue analogue à lafigure 2 illustrant cette même variante, en fonctionnement ; - la
figure 5 est une vue en perspective de deux ensembles de léchettes, représentés avec décalage axial, au repos ; et - la
figure 6 représente les mêmes ensembles de léchettes représentés en fonctionnement.
- the
figure 1 is a schematic sectional view of a sealing system between two coaxial shafts, shown at rest; - the
Figure 1A is a section II of thefigure 1 ; - the
figure 2 is a view similar to thefigure 1 illustrating the operation of the sealing system when the two shafts are rotating; - the
Figure 2A is a II-II section of thefigure 2 ; - the
figure 3 is a view similar to thefigure 1 illustrating a variant; - the
figure 4 is a view similar to thefigure 2 illustrating this same variant, in operation; - the
figure 5 is a perspective view of two sets of wipers, represented with axial offset, at rest; and - the
figure 6 represents the same sets of wipers represented in operation.
En considérant plus particulièrement les
Selon une caractéristique importante de l'invention, le système d'étanchéité comporte au moins un ensemble annulaire 20a, 20b sectorisé de léchettes 22, mobiles sous l'effet de la force centrifuge et se déplaçant sensiblement radialement vers l'arbre externe 14 lorsqu'elles sont soumises à cette force. Les léchettes 22 sont raccordées à l'arbre interne.According to an important characteristic of the invention, the sealing system comprises at least one segmented
Très préférentiellement, le système d'étanchéité comporte deux ensembles 20a, 20b précités de léchettes, décalés angulairement l'un par rapport à l'autre. L'agencement est particulièrement visible sur les
Une léchette 22 précitée d'un même ensemble comporte un élément d'obturation 24 comprenant ici une nervure plate 26 et une portion cylindrique 28 adjacente à ladite nervure plate et rattachée le long d'un bord de celle-ci. La nervure plate fait saillie vers l'extérieur c'est-à-dire en direction de la surface interne de l'arbre externe 14. Elle comporte un bord courbe 29 à contour circulaire. Cette nervure plate 26 s'étend sensiblement dans un plan radial en position de repos.A
Par ailleurs, l'élément d'obturation 24 est rattaché à une lame flexible 30 ancrée au fond d'un support 36a ou 36b dans lequel est définie une cavité cylindrique 38a ou 38b. Ce support est cylindrique et fixé à la surface extérieure dudit arbre interne. Cette cavité cylindrique est ouverte à l'extrémité, où se situe l'élément d'obturation 24. La nervure plate 26 s'étend à l'extérieur de la cavité et l'élément d'obturation coopère avec l'extrémité ouverte de ladite cavité. La cavité cylindrique 38a ou 38b est prolongée dans le support par des évidements longitudinaux 39 où s'étendent les lames flexibles 30. Ces dernières sont ancrées au support aux fonds de ces évidements. Dans l'exemple de la
Par ailleurs, selon une autre caractéristique remarquable de l'invention, un réceptacle annulaire pour liquide, ici constitué par une gorge 42 pratiquée à la surface intérieure de l'arbre externe permet de créer, lorsque l'arbre externe tourne, un anneau liquide centrifugé 40. Celui-ci est entretenu à la surface intérieure dudit arbre externe 14, en regard de bords courbes desdites léchettes, plus particulièrement les bords 29 des nervures 26.Furthermore, according to another remarkable feature of the invention, an annular receptacle for liquid, here constituted by a
Dans l'exemple, le liquide est avantageusement de l'huile.In the example, the liquid is advantageously oil.
La gorge annulaire 42 est située en regard du ou de chaque ensemble annulaire sectorisé de léchettes tandis que le gicleur d'huile est disposé au voisinage de cette gorge et est orienté pour y déposer de l'huile à chaque mise en rotation de l'arbre extérieur. Par conséquent, sous l'effet de la force centrifuge communiquée par la rotation de l'arbre extérieur, le liquide (huile) s'accumule et est maintenu au fond de la gorge annulaire. En fonctionnement, la portion cylindrique 28 vient en appui sur le support 36 en sorte que le bord courbe 29 plonge dans le liquide sans toucher le fond de la gorge 42.The
Lorsque les léchettes 22 se déplacent vers l'arbre externe, les bords courbes des nervures plongent dans l'anneau d'huile (voir
Dans le mode de réalisation des
Avantageusement, la gorge annulaire comporte une barrière de tranquillisation 46 agencée entre une partie annulaire 48 où plongent lesdites léchettes et une partie annulaire 50 adjacente, où l'huile est déposée. Plus précisément, cette partie annulaire adjacente se trouve en regard des orifices des perçages 47. La barrière de tranquillisation, globalement annulaire, comporte au moins une échancrure ou analogue permettant à l'huile de passer d'une partie à l'autre.Advantageously, the annular groove comprises a
Une autre gorge annulaire 56 jouxte celle qui est agencée en regard des léchettes. Elle est pratiquée sur la face intérieure de l'arbre externe dans l'espace inter-arbre et communique avec le carter par un drain 58 traversant cet arbre. Une fuite éventuelle d'huile est ainsi récupérée dans le carter. L'huile qui tombe dans le carter peut être récupérée et recyclée.Another
Comme le montrent les
Selon le mode de réalisation des
Ainsi, les deux ensembles de léchettes sont superposés l'un sur l'autre. Ils sont bien entendu décalés circonférentiellement comme dans l'exemple précédent et pour les mêmes raisons.Thus, the two sets of wipers are superimposed on one another. They are of course circumferentially offset as in the previous example and for the same reasons.
Dans ce mode de réalisation où les éléments analogues portent les mêmes références numériques, la buse 18 est directement dirigée vers la gorge annulaire 42 qui matérialise l'anneau de liquide centrifugé. Comme dans l'exemple précédent, la gorge annulaire comporte une barrière de tranquillisation 46 située entre la partie annulaire 48 où plongent les léchettes et la partie annulaire 50 adjacente où l'huile est déposée par le gicleur.In this embodiment, where the analogous elements bear the same numerical references, the
Claims (12)
- A sealing system between two coaxial superimposed rotary shafts, respectively an inner shaft (12) and a tubular outer shaft (14), characterized in that it includes, connected to the inner shaft, at least one sectorized annular assembly of wipers (22) that is movable under the effect of centrifugal force and that moves substantially radially towards the outer shaft, and an annular receptacle (42) for liquid arranged in the inside surface of the outer shaft facing curved edges of said wipers, said curved edges dipping into said liquid when said wipers are moved under the effect of centrifugal force.
- A system according to claim 1, characterized in that it has two of the above-specified assemblies (20a, 20b) of wipers that are offset circumferentially relative to each other.
- A system according to claim 2, characterized in that the two assemblies of wipers (20a, 20b) are arranged facing each other.
- A system according to claim 2, characterized in that the two assemblies of wipers are superimposed, one over the other (Figure 3).
- A sealing system according to any one of the preceding claims, characterized in that an above-specified wiper in a given assembly comprises a shutter element (24) having a substantially radial rib (26) with a curved edge (29), and in that said shutter element is connected to a flexible blade (30) anchored to the bottom of a support (36a or 36b) connected to the inner shaft, in which there is defined a cylindrical cavity (38, 38a, 38b) that is open at one end, said cylindrical cavity being defined in the surface of said inner shaft; and in that said shutter element (24) co-operates with the open end of said cylindrical cavity.
- A system according to claim 5, characterized in that said shutter element (24) includes a cylindrical portion (28) adjacent to said flat rib and attached along an inside edge thereof.
- A sealing system according to any one of claims 5 or 6 and to claim 3, characterized in that said inner shaft (12) has two open cylindrical cavities of which said open ends face each other, the shutter elements in a given assembly (20a, 20b) of wipers (22) co-operating with the open end of a corresponding cavity.
- A sealing system according to claim 5 or 6 and to claim 4, characterized in that said inner shaft (12) has a single open cavity (38), the shutter elements of the two assemblies (20a, 20b) of wipers co-operating in superposition with the open end of said single cavity.
- A system according to any one of the preceding claims, characterized in that said inside surface of the outer shaft (14) includes an annular groove (42) situated facing said sectorized annular assembly of wipers, and in that a nozzle for liquid (18) or the like is disposed in the vicinity of said groove and is oriented to deposit oil therein on each occasion said outer shaft is set into rotation.
- A system according to claim 9, characterized in that said annular groove includes a settling barrier (46) arranged between an annular portion (48) into which said wipers dip and an adjacent annular portion (50) in which the liquid is deposited using said nozzle.
- A turbomachine, characterized in that it includes two coaxial rotary shafts between which there is installed a sealing system according to any preceding claim.
- A turbomachine according to claim 11, characterized in that the two shafts are contra-rotating shafts.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0654193A FR2907183B1 (en) | 2006-10-11 | 2006-10-11 | SEALING SYSTEM BETWEEN TWO COAXIAL ROTATING TREES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1911998A1 EP1911998A1 (en) | 2008-04-16 |
EP1911998B1 true EP1911998B1 (en) | 2014-08-27 |
Family
ID=38042816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07118222.4A Active EP1911998B1 (en) | 2006-10-11 | 2007-10-10 | Sealing system between two coaxial rotating shafts |
Country Status (6)
Country | Link |
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US (1) | US7938616B2 (en) |
EP (1) | EP1911998B1 (en) |
JP (1) | JP5064164B2 (en) |
CA (1) | CA2606056C (en) |
FR (1) | FR2907183B1 (en) |
RU (1) | RU2445468C2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US8215894B2 (en) * | 2007-11-13 | 2012-07-10 | United Technologies Corporation | Dual configuration seal assembly for a rotational assembly |
GB201111531D0 (en) * | 2011-07-06 | 2011-08-17 | Rolls Royce Plc | A sealing arrangement |
GB2513045B (en) * | 2012-01-16 | 2018-04-11 | Snecma | Sealing device between two axisymmetric coaxial parts |
FR2985764B1 (en) | 2012-01-16 | 2014-02-28 | Snecma | COAXIAL INTER-TREE SEALING DEVICE OF A TURBOMACHINE |
US9453535B2 (en) | 2014-01-06 | 2016-09-27 | Hamilton Sundstrand Corporation | Oil retention and delivery system for a bearing |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3085838A (en) * | 1961-01-25 | 1963-04-16 | Gen Electric | Lubrication means |
FR1284281A (en) * | 1961-03-17 | 1962-02-09 | B M W Triebwerkbau Ges M B H | Gas turbine, especially small gas turbine |
US4013141A (en) * | 1975-10-16 | 1977-03-22 | General Electric Company | Means for lubricating a mechanism disposed within a rotating shaft |
JPS5445867U (en) * | 1977-09-07 | 1979-03-29 | ||
US4265334A (en) * | 1978-12-04 | 1981-05-05 | General Electric Company | Apparatus for lubrication of a differential bearing mounted between concentric shafts |
GB2092243B (en) * | 1981-01-31 | 1984-12-05 | Rolls Royce | Non-contacting gas seal |
JPS60121387A (en) * | 1983-11-30 | 1985-06-28 | 山野 陸三 | Leakproof device for high-pressure fluid |
US4683714A (en) * | 1986-06-17 | 1987-08-04 | General Motors Corporation | Oil scavenge system |
US5738488A (en) * | 1996-11-12 | 1998-04-14 | General Electric Co. | Gland for transferring cooling medium to the rotor of a gas turbine |
US6196790B1 (en) * | 1998-12-17 | 2001-03-06 | United Technologies Corporation | Seal assembly for an intershaft seal in a gas turbine engine |
EP1284281B1 (en) * | 1999-04-06 | 2009-02-25 | Sasol Technology (Proprietary) Limited | Synthetic Naphtha Fuel |
US6629816B2 (en) * | 2001-08-16 | 2003-10-07 | Honeywell International Inc. | Non-contacting clearance seal for high misalignment applications |
JP3932902B2 (en) * | 2002-01-18 | 2007-06-20 | 石川島播磨重工業株式会社 | Anti-rotation device for rear side seal member in hydraulic seal of biaxial aircraft engine |
JP2003286806A (en) * | 2002-03-26 | 2003-10-10 | Ishikawajima Harima Heavy Ind Co Ltd | Hydraulic seal structure, hydraulic seal structure in gas-turbine engine, and gas-turbine engine |
RU2239098C1 (en) * | 2003-06-18 | 2004-10-27 | Макин Ким Дмитриевич | Compressor for gas-turbine engine |
FR2861129A1 (en) * | 2003-10-21 | 2005-04-22 | Snecma Moteurs | Labyrinth seal device for gas turbine device, has ventilation orifices provided at proximity of fixation unit, and compressor with last stage from which upward air is collected immediately |
GB0406174D0 (en) * | 2004-03-19 | 2004-04-21 | Rolls Royce Plc | Turbine engine arrangement |
US7329048B2 (en) * | 2005-07-19 | 2008-02-12 | Rolls-Royce Corporation | Self contained squeeze film damping system |
-
2006
- 2006-10-11 FR FR0654193A patent/FR2907183B1/en not_active Expired - Fee Related
-
2007
- 2007-10-05 US US11/868,043 patent/US7938616B2/en active Active
- 2007-10-09 CA CA2606056A patent/CA2606056C/en active Active
- 2007-10-09 JP JP2007263061A patent/JP5064164B2/en active Active
- 2007-10-10 EP EP07118222.4A patent/EP1911998B1/en active Active
- 2007-10-10 RU RU2007137644/06A patent/RU2445468C2/en active
Also Published As
Publication number | Publication date |
---|---|
RU2007137644A (en) | 2009-04-20 |
EP1911998A1 (en) | 2008-04-16 |
US7938616B2 (en) | 2011-05-10 |
CA2606056A1 (en) | 2008-04-11 |
FR2907183A1 (en) | 2008-04-18 |
JP5064164B2 (en) | 2012-10-31 |
CA2606056C (en) | 2014-12-30 |
RU2445468C2 (en) | 2012-03-20 |
US20080089624A1 (en) | 2008-04-17 |
JP2008095957A (en) | 2008-04-24 |
FR2907183B1 (en) | 2009-01-30 |
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